Add cli option force shell show stderr/stdout

Passing `--verbose` flag two times will now force shell commands to show
stderr/stdout output regardless of settings in config file.

Resolves #104

dotbot/cli.py

@@ -1,7 +1,7 @@
 import os, glob
 import sys
 
-from argparse import ArgumentParser
+from argparse import ArgumentParser, RawTextHelpFormatter
 from .config import ConfigReader, ReadingError
 from .dispatcher import Dispatcher, DispatchError
 from .messenger import Messenger
@@ -16,8 +16,10 @@ def add_options(parser):
         help='suppress almost all output')
     parser.add_argument('-q', '--quiet', action='store_true',
         help='suppress most output')
-    parser.add_argument('-v', '--verbose', action='store_true',
+    parser.add_argument('-v', '--verbose', action='count', default=0,
-        help='enable verbose output')
+        help='enable verbose output\n'
+             '-v: typical verbose\n'
+             '-vv: also, set shell commands stderr/stdout to true')
     parser.add_argument('-d', '--base-directory',
         help='execute commands from within BASEDIR',
         metavar='BASEDIR')
@@ -47,7 +49,7 @@ def read_config(config_file):
 def main():
     log = Messenger()
     try:
-        parser = ArgumentParser()
+        parser = ArgumentParser(formatter_class=RawTextHelpFormatter)
         add_options(parser)
         options = parser.parse_args()
         if options.version:
@@ -57,7 +59,7 @@ def main():
             log.set_level(Level.WARNING)
         if options.quiet:
             log.set_level(Level.INFO)
-        if options.verbose:
+        if options.verbose > 0:
             log.set_level(Level.DEBUG)
 
         if options.force_color and options.no_color:

dotbot/plugins/shell.py

@@ -10,6 +10,7 @@ class Shell(dotbot.Plugin):
     '''
 
     _directive = 'shell'
+    _has_shown_override_message = False
 
     def can_handle(self, directive):
         return directive == self._directive
@@ -23,6 +24,7 @@ class Shell(dotbot.Plugin):
     def _process_commands(self, data):
         success = True
         defaults = self._context.defaults().get('shell', {})
+        options = self._get_option_overrides()
         for item in data:
             stdin = defaults.get('stdin', False)
             stdout = defaults.get('stdout', False)
@@ -47,6 +49,8 @@ class Shell(dotbot.Plugin):
                 self._log.lowinfo('%s' % msg)
             else:
                 self._log.lowinfo('%s [%s]' % (msg, cmd))
+            stdout = options.get('stdout', stdout)
+            stderr = options.get('stderr', stderr)
             ret = dotbot.util.shell_command(
                 cmd,
                 cwd=self._context.base_directory(),
@@ -62,3 +66,14 @@ class Shell(dotbot.Plugin):
         else:
             self._log.error('Some commands were not successfully executed')
         return success
+
+    def _get_option_overrides(self):
+        ret = {}
+        options = self._context.options()
+        if options.verbose > 1:
+            ret['stderr'] = True
+            ret['stdout'] = True
+            if not self._has_shown_override_message:
+                self._log.debug("Shell: Found cli option to force show stderr and stdout.")
+                self._has_shown_override_message = True
+        return ret

test/tests/shell-cli-override-config.bash

@@ -0,0 +1,79 @@
+test_description='cli options can override config file'
+. '../test-lib.bash'
+
+test_expect_success 'run 1' '
+(run_dotbot -vv | (grep "^apple")) <<EOF
+- shell:
+  -
+    command: echo apple
+EOF
+'
+
+test_expect_success 'run 2' '
+(run_dotbot -vv | (grep "^apple")) <<EOF
+- shell:
+  -
+    command: echo apple
+    stdout: false
+EOF
+'
+
+test_expect_success 'run 3' '
+(run_dotbot -vv | (grep "^apple")) <<EOF
+- defaults:
+    shell:
+      stdout: false
+- shell:
+  - command: echo apple
+EOF
+'
+
+# Control to make sure stderr redirection is working as expected
+test_expect_failure 'run 4' '
+(run_dotbot -vv | (grep "^apple")) <<EOF
+- shell:
+  - command: echo apple >&2
+EOF
+'
+
+test_expect_success 'run 5' '
+(run_dotbot -vv 2>&1 | (grep "^apple")) <<EOF
+- shell:
+  - command: echo apple >&2
+EOF
+'
+
+test_expect_success 'run 6' '
+(run_dotbot -vv 2>&1 | (grep "^apple")) <<EOF
+- shell:
+  -
+    command: echo apple >&2
+    stdout: false
+EOF
+'
+
+test_expect_success 'run 7' '
+(run_dotbot -vv 2>&1 | (grep "^apple")) <<EOF
+- defaults:
+    shell:
+      stdout: false
+- shell:
+  - command: echo apple >&2
+EOF
+'
+
+# Make sure that we must use verbose level 2
+# This preserves backwards compatability
+test_expect_failure 'run 8' '
+(run_dotbot -v | (grep "^apple")) <<EOF
+- shell:
+  - command: echo apple
+EOF
+'
+
+test_expect_failure 'run 9' '
+(run_dotbot -v | (grep "^apple")) <<EOF
+- shell:
+  - command: echo apple >&2
+EOF
+'